Platen



Dec. 14 1926.

1,610,264 D. C. DAUBMEYER I PLATEN Filed Sept. 28, 1925 2 Sheets-Sheet/7 I 3 lave-M501 31 WW v 6410: new

Dec. 1'4 1926. 1,610,264

D. c. DAUBMEYER PLATEN Filed Sept. 28 192s 2 Sheets-Sheet 2 agb mmwifwPatented Dec. 14, 1926.

"DEWEY c. DAUBMEYER, or'nnrnorr, MICHIGAN. I

. PLVATEN.

Application filed September 28, 1825 Serial No.'59,123.

i This invention relates to platens or paper supports and moreparticularly to combination platens or paper supports adapted for useoniaddmg, accounting, calculating, book keeping and 'typewritingmachines and the like. v I Heretofore the platens or other papersupporting members employed in 'connec,

'tionwith the various knowntypes of calcue latingandtypewriting machineshave been of a uniform surface hardness throughout;

If under these circumstances a platen is selected whose surface isrelatively-hard multicopy work may be satisfactorily done but whenit-was desired to make asingle copy it was found that'the lack ofresilience in the platen or paper'support resulted in theper forationofthe paper or other imprint receiving materialrand a pitting'of theplaten by reasonof the force of impact of the type. When on the otherhand platens having rela *tively soft surfaces were employed,xtheperforation' of the paper and the pitting of the platen was eliminatedbut difficulty was experienced in satisfactorily making simultaneously aplurality of copies. .Therefore a platen having a uniform surfacehardness has been found totally inadequate in multicopy and single,copywork. w a

Furthermorejin machmes wherein certain portions of'the, platen or papersupporting member are employed for supporting a :plu-

ralitv of sheetsfor multi-copy work waneanothep area of the platen issimultaneously used for'supporting a single sheet for si ngle .copy worksimilar] difliculties have arisen. If a :platen haying a surface of ahardness suflicient for multi-copy work, is employed, then thatportionused continuously for sin 0 gle copy-work becomes pitted andi n arelatively short time the platen is unfit for further ruse. On theother'handif a platenis 'selected 'havinga relatively soft impact surface the pitting of the platen at the.single copy portion 'is preventedbuta plurality of copies cannot be satisfactorily made.

lhe principal" object' of this invention therefore is to provide aplaten or papersupporting member having areas of "different degreesofsurface hardness whereby one portion of the platen, which is relativelyV hard, may be used for, multi-copy work; whereas another portion of theplaten, which is relliatively' soft, may be used for single copy wor w xThe novel features'of construction ofthe invention as well as severallllustrative embodiment sfof the samewill'be made more apparent asthisdescription'proceedsfespecially when considered in connection-withthe accompanying drawings wherein f V Figrl is a fragmentary elevationalView of an'accounting machine with my invention 1 applied thereto, 1

Fig. 2 is afragmentary side elevation of the structure illustrated inFig.1,

' Fig. 3 is anelevational view of theltype of platen used inmachinessuch, as shown in Figures 1- and '2,

I Fig. 4 is afragmentary elevational view of a well-known. type ofbookkeeping mach ne having a platen constructed in accord ance w th myinvention, and

'F1g., 5 1s a perspective view of the platen embodied in the typeof-machine illustrated?! in Fig. 4:. Referring now-at'o the drawings andparticularly to Figures 1 to 3,.attention is directed to Fig.1 wherein aconventional form of accounting machinev is fragmentarilyl il- 30lustratcd, the structure including a frame work consisting vof a pairpfside frame members 10' adapted to movably support-a j plurality ofrods 11 upon which a, pairof paper rolls 12 and acarbon paper roll f13 3are mounted. The rolls 1?. and 13 are slid- .ablellongitudinal-ly oftherodsll and' are" secured in their adjusted positions preferably byfmeansof set screws 14'.

The frame members 10 are secured'to a 0 platen carriage or frame 1-5uponwhich the )5 platen 16. is rotatably mounted. The 'referencecharacter'17 indicates the banks ofjtype and 18 the hammers,'employed inmachines of this character, for moving theItype into printingvrelationwith the paper; I v

The platen 16, illustrated more clearly in :Fig; 3, has its impactsurface'thereof di- I 'vided along the line 19 into two sections 20 and21.. The surfaceof section 20 is rela-.

tively hard so" that this portion-of the'platen may be usedforim'ulti-copy, work, while the I surface.'of'section21 is relativelysoft so that this portion of'the platen may befr'nore read ily andefficiently usedfor making single copies. While the surface of theplaten apparent that it falls within the scope of this ll of surfacehardness.

When my improved platen or paper supporting m-emberis associated with amachine of the character herein described and it is desired to make aplurality of copies the rolls 12 and 13 carrying record and carbon paperrespectively are adjusted on the bars 11 to substantially the positionillustrated in'Fig. 1, whereupon the superposed strips of record andcarbon papers maybe brought around the platen 16 in the manner clearlyillustrated in Figs. 1 and 2 and in position to receive the impressionfrom the type of type banks 17 when actuated by the hammers 18. Itshould be understood that the carriage 15 supporting the platen. and thepaper roll frame is movable transversely with reference to the typebanks 17. p 7

When but asingle copy is desired and when consequentlyaplaten having asofter impact surface is desirable, one of the paper rolls 12 may beadjusted to the. left hand end ofone of the bars, 11 .and the paper"strip therefrom brought around section-21 of the platen 16. Thecarriage is then shifted to the right as viewed inFig. 1 so as to bringplaten section 21 and the paper supported thereon into register with thekey banks 17.. If desired an additional paper roll such as indicated at22 by dotted lines in Fig. 1 may be mounted on one of the rods 11 so asto avoid the necessity of adjusting one of the rolls 12 when a singlecopy is desired. VYith such an arrangement it would be only necessary toshift thecarriage .15 to bring the paper strip from roll 22 and platensection 21 into register with the key banks. I I

While the invention has. thus far been described as used in'connectionwith machines wherein either multi-copy or single. copy records'are tobe made and wherein only one section of the platen is used at a time,still platens of this character find further utility in machines whereinsingle and multi-copy records are simultaneously desirable, in

which latter instancesuitable banks of. keys would be broughtsimultaneously or successively into register with. both sections of theplaten.

' Referring now to Figures 4 and 5 and more particularly to Figure 4, itwill be noted that I have illustrated fragmentarily a portion of abookkeeping machine which includes a frame comprising a pair of sidemembers 25 upon which a platen or paper supporting member 26 is mounted.This platen is in the form of a bed or plate. ,The

I frame also provides support for a plurality "of rods 27 upon whichcarbon paper rolls 28 are mounted, this carbon paper being preferablypassed-around a rod 29 adjacent the rear of the machine and thenforwardly superposed sheets of record paper to a clamping bar 30arranged adjacent the front of the machine. The reference character 31indicates racks arranged at both sides of the machine upon which theprinting mechanism indicated by dotted lines as at 32, travels. Inmachines of this character the printing mechanism is movable forwardlyand rearwardly as well as transversely upon the frame to thus bring sameinto register with the proper columns onthe record sheets supported onthe platen 2 'i Vhile any number and arrangement of record sheets may besupportedupon the platen 26, still in Figure l I have shown three recordsheets consisting of a principal or ledger sheet 33 and two superposedsec ondary or bill sh-eets'3 l and 35. Conse quently' with thearrangement shown three record copieswill be madecat the area indircated at A,,, two record copies will' be made at the, area indicated byB and one copy at the area indicated by C.

.By. reference to Figure 5 wherein the platen. 26 is illustrateddisassembled from the machine it will be noted that the impact surfacethereof is shown as formed in three sections 36, 37 and 38. The dividinglines between areas 36 and 37 and between the areas 37 and 38 beingindicated by the reference character 39 and being further shown asextendinglongitudinally thereof. If the platen 26 is to be used mostefiiciently in connection with the sheets 33, 34 and 35 associated inthe manner illustrated in'Figure 4: then the portion 36, of the impactsurface thereof will be relatively hard while those portions indicatedby the reference characters 37 and 38 will be successively relativelysofter. Consequently area 38 which is the softest portion of the platenwill be used to support that portion of sheet 33 upon which a singlecopy'is to be made; area 37 will be usedto support superposed sheets 33and 35 upon which two copies are to be made, and area 36, will supportthe three superposed sheets 33, 34, and 35 where on threecopies are tobe made.

While as an example a platen of the bed 01 plate type has beenillustrated and described ascomprising three surfaces of relative"degrees of hardnessstill itwill be un-. derstood that this is forillustrative purposes only and that this bed type of platen may beprovidedwith only two or any number of sections of relativesurfacehardness.

As hereinbefore menti-oned, the platens 16 or.26 may as desired, beprovided with additional sections of different degrees of surfacehardness and obviously the platen is not limited in its use to theconventional form of accounting unachines herein illustrated, but isequally. adapted to various types of accounting, calculating and typewriting machines. The invention therefore should not be limited to'thespecific disclosures herein contained, reservation being made to makesuch changes in the details of construction as may come within thepurview of the accompanying claims. v

What I claim asmy inventionis:

1. A platen or paper support, the working.

field of which is divided to provide adjacent relatively hard and softareas, whereby said platen is adapted for the production of sin gleor'cmulti copies. I r

r 2. A platen havl end thereof relatively hard for single and multi-Copywork respectively.

V a continuous impact recelvlng surface formed with relatively isadapted for the production of single or 4. A cylindrical platenhaving'an impact receiving surface divided into a plurality ofcylindrical sections of'relatively-difierent degrees of hardness,whereby the said platen is. adapted for the production of single ormulti copies.

single impact receiving surface smooth multi copies. I l

6. platen having an integral impact receiving surface transverselydivided into a pluralityof sections of relatively difierent degrees ofhardness, whereby thesaid platen is adapted for the production of singleor multi copies.

1 V 5. A platen or paper support .havinga In testimony whereof Iiaffixmy signature;

' ,DEWEY-JQDALUBMEVYEVR. i

throughout the area thereof and divided into a plurality of sectionsofrelatively different degrees of hardness, whereby said platen is v p aadapted for the production of single or

